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When the token payment is executing by button in a mobile app, the following actions are performed:

1. The buyer selects the product or service in the store mobile app and presses the pay button.
2. An encrypted packet with payment data and a token is generated by accessing the SDK of Apple Pay  API.
3. The SDK of Apple Pay conducts the required payment authorization by the buyer on the mobile device (PIN / fingerprint).
4. The encrypted packet with payment data and a token is transferred to the TokenPay payment service on the side of IPS Assist.
5. IPS Assist decrypts the package and performs payment with a token.
6. IPS Assist returns the payment results to the mobile app.

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